Display Function Of Inspection For Outdoor Unit - Mitsubishi Electric PUHZ-P200YKA.UK Service Manual

<Display function of inspection for outdoor unit>
The blinking patterns of both LED1 (green) and LED2 (red) indicate the types of abnormality when it occurs. Types of
abnormality can be indicated in details by connecting an optional part 'A-Control Service Tool (PAC-SK52ST)' to connector
CNM on outdoor controller board.
[Display]
(1)Normal condition
Unit condition
When the power is turned on
When unit stops
When compressor is warming up
When unit operates
(2)Abnormal condition
Indication
Outdoor controller board
LED1 (Green) LED2 (Red)
1 blinking 2 blinking
Connector (63H) is open.
Miswiring of indoor/outdoor unit conne-
2 blinking 1 blinking
cting wire, excessive number of indoor
units (4 units or more)
Miswiring of indoor/outdoor unit co-
nnecting wire (converse wiring or di-
sconnection)
Startup time over
Indoor/outdoor unit communication error
2 blinking
(signal receiving error) is detected by in-
door unit.
Indoor/outdoor unit communication error
(transmitting error) is detected by indoor
unit.
Indoor/outdoor unit communication error
(signal receiving error) is detected by
outdoor unit.
Indoor/outdoor unit communication error
(transmitting error) is detected by outdoor
unit.
3 blinking
Remote controller signal receiving
error is detected by remote controller.
Remote controller transmitting error
is detected by remote controller.
Remote controller signal receiving
error is detected by indoor unit.
Remote controller transmitting error
is detected by indoor unit.
4 blinking
Check code is not defined.
5 blinking Serial communication error
<Communication between outdoor
controller board and outdoor power
board>
<Communication between outdoor
controller board and M-NET P.C. board>
Communication error of M-NET
system
*1.Check code displayed on remote controller
OCH582B
Outdoor controller board
LED1 (Green) LED2 (Red)
Lighted Lighted
Lighted Not lighted
Lighted Not lighted
Lighted Lighted
Check
Contents
code
*1
F5
—
—
—
E6
E7
—
—
E0
E3
E4
E5
EF
PL
Ed
A0–A8
65
Check code
00, etc.
08, etc.
C5, H7, etc.
Error
Inspection method
1Check if connector (63H) on the outdoor controller board is
not disconnected.
2Check continuity of pressure switch (63H) by tester.
1Check if indoor/outdoor connecting wire is connected correctly.
2Check if 4 or more indoor units are connected to outdoor unit.
3Check if noise entered into indoor/outdoor connecting wire
or power supply.
4Re-check error by turning off power, and on again.
1Check if indoor/outdoor connecting wire is connected correctly.
2Check if noise entered into indoor/outdoor connecting wire or
power supply.
3Check if noise entered into indoor/outdoor controller board.
4Re-check error by turning off power, and on again.
1Check if connecting wire of indoor unit or remote controller
is connected correctly.
2Check if noise entered into transmission wire of remote
controller.
3Re-check error by turning off power, and on again.
1Check if remote controller is MA remote controller(PAR-21MAA).
2Check if noise entered into transmission wire of remote controller.
3Check if noise entered into indoor/outdoor connecting wire.
4Re-check error by turning off power, and on again.
1Be sure to replace the 4-way valve.
2Check refrigerant pipes for disconnection or leakage.
3After the recovery of refrigerant, vacuum dry the whole
refrigerant circuit.
4Refer to "10-6.HOW TO CHECK THE PARTS".
5Check refrigerant circuit for operation.
1Check if connector (CN4) on outdoor controller board and
outdoor power board is not disconnected.
2Check if there is poor connection of connector on outdoor
controller board(CNMNT and CNVMNT).
3Check M-NET communication signal.
A-Control Service Tool
Indication of the display
Alternately blinking display
Operation mode
Detailed
reference
page
P.30
P.31
(EA)
P.31
(Eb)
P.31
(EC)
P.37
P.37
P.37
(E8)
P.37
(E9)
P.36
P.36
P.36
P.36
P.37
P.38
P.38
P.39 to
P.42